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Implement locking in SQLite

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This commit is contained in:
Zwelf 2020-07-12 12:21:41 +02:00
parent 1677e1fed5
commit 17de42a947
2 changed files with 11 additions and 0 deletions
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10
src/engine/server/databases/sqlite.cpp
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@ -11,6 +11,7 @@ CSqliteConnection::CSqliteConnection(const char *pFilename, bool Setup) :
m_pDb(nullptr), m_pDb(nullptr),
m_pStmt(nullptr), m_pStmt(nullptr),
m_Done(true), m_Done(true),
m_Locked(false),
m_InUse(false) m_InUse(false)
{ {
str_copy(m_aFilename, pFilename, sizeof(m_aFilename)); str_copy(m_aFilename, pFilename, sizeof(m_aFilename));
@ -67,6 +68,7 @@ IDbConnection::Status CSqliteConnection::Connect()
return Status::ERROR; return Status::ERROR;
m_Setup = false; m_Setup = false;
} }
m_Locked = false;
return Status::SUCCESS; return Status::SUCCESS;
} }
@ -80,10 +82,18 @@ void CSqliteConnection::Disconnect()
void CSqliteConnection::Lock(const char *pTable) void CSqliteConnection::Lock(const char *pTable)
{ {
// locks the whole database read/write
Execute("BEGIN EXCLUSIVE TRANSACTION;");
m_Locked = true;
} }
void CSqliteConnection::Unlock() void CSqliteConnection::Unlock()
{ {
if(m_Locked)
{
Execute("COMMIT TRANSACTION;");
m_Locked = false;
}
} }
void CSqliteConnection::PrepareStatement(const char *pStmt) void CSqliteConnection::PrepareStatement(const char *pStmt)

1
src/engine/server/databases/sqlite.h
View file

@ -45,6 +45,7 @@ private:
sqlite3 *m_pDb; sqlite3 *m_pDb;
sqlite3_stmt *m_pStmt; sqlite3_stmt *m_pStmt;
bool m_Done; // no more rows available for Step bool m_Done; // no more rows available for Step
bool m_Locked;
// returns true, if the query succeded // returns true, if the query succeded
bool Execute(const char *pQuery); bool Execute(const char *pQuery);